Magnetic fixture



Nov. 17, 1925. 1,561,554

F. B. LITTLE MAGNETI C FIXTURE Filed Sept. 2, 1921 Patented Nov. 17,1925.

UNITED STATES FREDERICK B. LITTLE, OF CHICAGO, ILLINOIS.

MAGNETIC FIXTURE.

Application led September 2, 1921.

0 all whom t may concern.'

Be it known that I, FREDERICK B. LITTLE, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Magnetic Fixtures, ofwhich the following is a specification.

This invention relates to magnetic xtures.

It will be explained as applied to a lixture for supporting a portableelectrical appliance, suoli as a trouble lamp for an automobile.

One of the objects of the invention is to provide an improved fixturefor portable electrical appliances.

Another object is to provide an improved magnetic support for portableelectrical appliances. v

Another object is to provide a fixture which is neat, compact, efficientand inexpensive.

Another object is to provide an improved fixture for a portableautomobile trouble lamp.

Another object is to provide an electromagnetic fixture which may b ereadily tapped into the circuit ot the appliance with which it is to beused.

Other objects and advantages will hereinater appear.

An embodiment of the invention is illus trated in the accompanyingdrawing, where- Fig. 1 is a perspective of the fixture.

Fig. 2 is an axial cross section thereof.

Fig. 3 is an elevation thereof.

Fig. d is an enlarged cross section through. the terminal support.

Fig. 5 is a perspective oit the fixture supporting a portable troublelamp.

rlhe fixture comprises, in general, a inagnetizable base, a holder fordetachably supporting a ortable electrical appliance and terminals -torreadily tapping into the oircuit of the appliance to obtain current forenergizing the magnet.

The base has a cup shaped outer shell or casing 1 of suitable magneticmaterial such as steel or iron. l/Vithin and supported by this shell isa magnet spool 2.

Spool 2 comprises a central magnetic core 3 and two insulatinnon-magnetic heads d. Fiber may be used or these heads) .hn energizingwinding 5 is wound about core 3 between heads 4, The heads are held inSerial No. 498,120.

place upon core 3 by indenting or upsetting portions of the core to formsmall projecting spurs 6 against which the heads abut.

The inner end of core 3 is drilled and internally threaded for anassembling screw 7. The back wall 0f shell 1 has openings therethroughfor the passage of screw 7 and the leads to the magnet winding.

Su erposed insulating blocks 8 and 9, of suita le material suchl asliber, are supported upon the top of shell 1. Block 8 has a pair oftapering sided grooves 10 in its top surface and in the bottom of eachgroove is a hole 11 which is countersunk at its lower end. A sharppointed terminal 12 extends upwardly through each hole 11. lheseterminals may be ordinary tacks, the heads of which lie in thecountersunlr lower ends of holes 11. The terminals are long enough toextend a short distance above the bottoms of grooves 10.

rlhe ,leads to the magnet winding are soldered to the enlarged lowerends of terminals 12. Block 9 may be grooved in its upper surface toaccommodate these leads. A pair of screws 13, passing through blocks 8and 9 and threading into the top of shell 1. serve to hold the blocks tothe shell and clamp the terminals in position with the points thereofextending slightly above the bottoms of grooves 10.

A small ber cleat 14 is secured to block 8 by screws 15. Cleat 111 hasits under surface provided with a pair of small ridges or tongues 16which register with grooves 10 in block 8. A hole 17 in each tongue liesabove the point of the corresponding terminal 12.

A U shaped clip 18, which serves as an appliance holder is secured uponthe top of block 8 by screw 7. rllhe adjustment of the clip prongs maybe varied by a screw 19. Screw 7 therefore holds the clip, shell andspool together.

Clip 18 serves to detachably support a portable electrical appliancesuch as the portable automobile trouble lamp 20. Such lamps are wellknown and usually have a suitable handle 21 carryin a lamp socket 22 anda lamp guard 23. gllhe lamp is fed through conductors 2t of an extensioncord which passes through handle 21.

To use the device the insulation covered conducting leads ot 'theextension cord of the portable appliances are inserted under cleat 14 ingrooves 10 and screws 15 are tightened. The cleat forces the leads downupon mit mit

the points of terminals 12 which penetrate the msulation and makecontact with the conductors therein, as shown in Fig. 4. The circuit tothe appliance is thus tapped and the magnet winding is connected thereinin parallel with the appliance. n

The handle of the appliance is inserted 1n clip 18 and, because of theattraction or the energized magnet, may be held 1n position on anymagnetic substance.

When it is desired to use the lamp without the ma etic fixture thehandle can be removed rom the holder and the conducting leads releasedfrom cleat 14.

The small sharp points of the terminals, although they penetrate thecord and contact with the stranded conductors therein, do not materiallyaiect the insulation so that the appliance with which the fixture isused is not injuredo The insulation is readily pierced so that it isunnecessary to remove or cut any part of the same andvconnection may bequickly made by the use of a screw driver only.

Although the fixture has been explained as applied to a trouble lamp itmay be employed with many other electrical appliances, such for example,as plugs, receptacles, sockets, soldering irons, etc.

Having described my invention what I claim as new and desire to secureby Letters Patent, is Y 1. A magnetic structure ,for supporting anelectric hand lamp comprising a magnetic shell; a magnetizing coiltherein; a hand lamp having a handle; a clip on the shell to clasp andhold the handle; a duplex cord wire for connecting the lamp to a sourceof current supply; sharp pointed terminals for the ma etizing coilmounted on said shell and aA apted to pierce the insulation oft-he'duplex wire for connecting said coil and lamp in parallel circuitand a clamp member havlng ollow projections overlying said pointedterminals. l

2. The combination with a magnetic xture of a detachable appliancetherefore, said appliance being adapted to receive current through anextension cord, a magentizing base for said xture, a spring clip forclamping and holding` said appliance, and pointed terminals on said baseadapted to engage and hold the extension cord and pierce the insulationthereof to make electrical contact with the enclosed wires for supplyingthe base with magnetizing 4curren 3. A magnetic fixture for holding aportable electrical appliance which rece1ves current'through anextension cord, comprising an outer shell, an inner core spaced from theshell, an energizing winding located between the core and shell, aholder mounted on the shell and adapted to detachably support theappliance, terminals mounted on the shell and connected to the winding,and means for clamping the cord to the shell and causing the terminalsto electrically engage the same to connect the winding in circuit withthe appliance.

In testimony whereof I hereunto subscribe my name.

FREDERICK B. LITTLE,

